Artificial tooth.



F. T. VAN WOERT.

. ARTIFICIAL TOOTH. APPLICATION FILED APR. I6, I913.

1,142,385. Patented June 8, 19 15.

. INVENTOR WITNESSES: 3 M Z @w' W W By Aflomeys,

MJW

THE mmms PETERS co., WASHING! ooooo c.

FRANK '1. VAN wonn r, or NEW YORK, N. Y.

' ARTIFIGIAL rooTH.

To all whomlit may concern Be it known that I, FRANK T. VAN Wonn'r,

, a citizen of the United States, residing in the borough of Brooklyn, county ofKings, city and State of New York, have invented cer- "tain new and useful Improvements in Artificial Teeth, of whichthe following is a specification.

method of forming. a'connection between the attaching pins or'posts by means of which the tooth is-connected to the plate.

. According tothe present invention I provide a: construction'in which the fastening -pins are securely locked in place by mechanical means after the tooth is baked. I also prefer to so construct the parts that spaces are left between the pins and surrounding tooth walls, so that when the teeth are applied to the plate the rubber compofsition is capable of being forced practically completely around the pins, so that the joint between the pins and tooth is adequately cushioned whereby the danger offracture is reduced or avoided. v

Referring to the drawings, illustrating my invention, .Figure' 1 is an inner side view of a tooth provided by my invention,'the

7 pins beingshown in section as indicatedby the line 11'-in'Fig. 3. Fig. 2 is a sectional view of Fig.3, taken on the line 22, the

pin member being omitted. Fig.3 is a sectional view taken on the line 33 in "Fig. 1. Fig. tie a perspective view of the inner face of the tooth., Fig.5 is a sectional view of the tooth of Fig. 1', shown applied to the plate.- c a Referring to the drawings, let A indicate an artificial tooth usually formed of porcelain and B the fastening means. as a whole.

According to the present invention I form a socket orchamber in the tooth by the aidv of a suitable core which is inserted in the V The fastener herein illustrated comprises a body portion H consisting of a yieldable and preferably elastic bar uniting'the pins J J. The ends of the bar H are shown pro- Specification of Letters Patent.

Patented June 8, 1915.

Application filed April 16, 1913. Serial No. 761,520.

jecting at I I beyondthe points of its junc- 'a portion E for the inter-pin portion H of the bar and portions F F for the bar ends 1 I. A slot or passageway comprising two portions leads, from the exterior of the tooth to the bar seat. One of these portions Eis located on the plane of the seat E and has one side opening into said seat and its opposite side curved outwardly therefrom. V

The other portion Cc-of the slot is disposed:

transversely of the bar seat and is curved and has one side registering with the curved side of the slotted portion E. The ends 0 0 of the curved portion of the slot are disposed on a line with the ends FF and inwardly thereof. There is a solid portion D over-hanging the seat E and a portion of the slot E and portions G G over-hanging the ends F F of the seat. The fastener erably is a one piece structure.

The chamber and fastener are of such relative proportions that when the bar is in itsnormal condition and seated, its interpinportion H will be disposed in the seat itener which is in it being such that the parts cannot be disassembled without dislocation or breakage.

To insert the fastener inthechamber and seat the same the bar H isflexed sufficiently to traverse the slot portion C and is then caused or permitted, as the case may be,

so prefdepending upon the'condition of elasticity of the bar, to assume its normal condition and shape and-traverse the slot portion E and the bar and its ends enter the seat.

It will be seen that in effect the construcytlOIl provided is such that when the pin member is introduced it is locked in place,

and this locking action is such that the pin mannot be removed by any working strain (that may beapplied toit, after it is once inserted. In the construction illustrated the barmay be formed of resilient material so that it maybe given a sufficient bow or bend to pass it within the exterior opening the bar expanding when it reaches the bottom of the socket and automatically as' suming the position of FigJ-l;'or the bar cording to either method thel'exterior open- "ing-in the tooth is shaped to permit the introduction of the pin when theklatter is distorted; .and the'interior opening seat is shaped to "securely lock the bar when the latter assumes substantially "its'normal condition; that isrnot flexed. It is -tobe noted.

that in this structure the socket and the fastener areof such relative dimensionsand formations that the portion of the fastener seated in the socket is bent during such seating' and that the, last stage of the seating movement of such portion 7 is" transverse 'to the, working strain applied to the fastener through the pins. The fastener when seated is in theform of a loop locatedunder 1a '25 fsshelf integral with the tooth. Theengaging face of] the shelf'is shown disposed transversely of the working strainupon the fastening pins.-

' tooth; nei' ertheless' the construction permits After the fastener has been seated the bending incident "to the working strain cannot remove the fastener from itsiseat.

possible to remove it without breaking the the provision of spaces around the fastener into which the rubber composition mayr how so that it practically surrounds the metal at all points, andprovides' a cushion -'-between the metal and porcelain which a tends to prevent fracture of theporcelain when the tooth is in use. In Fig; 5 1' have illustrated a tooth connected to a plate which illustrates this feature," the rubber being indicated by the reference letter, K..

V The relation between the pin ends or 7 heads j j "and the bar ends I I is such that the strain holdingthe tooth in position is {placed upon the bar and its ends in such "directionthat' it, withstands the strain with out distortion. The tooth at this Point pre:

sentsjover-lianging portions G G for engaging theends I I, which ends cooperate with the over-hanging portion B e a In the invention as thus described when the tooth is'applied to the rubber plate, the

rubbergas before stated, enters into the recesses and notonly forms' a cushion, but

also fills' all o'ff -the spaces left 'free' and effectually prevents anyfdislodgement or 'movement of the'pin member, thus securing fa firm and rigid connection between the plate and the tooth. c

It will 'be'observed that by my invention f the tooth so as to be practically inseparable thereto, as'fvai'ious changes can be made An; important feature of the-construction just described isthat while thefastener'is' "securely locked so that it is practically --im "G I 7 v 1 i i .7

a -;2.-'As ail-article ofmanufacturea tooth 9 having within it a fastener seat and being i 5,. The combinatiomwitha too'th'having 125 Lwithin it a fastener seat and being provided with a slot having aportion'disposed in the very easily and cheaply manufactured without the use of expensivemetals or delicate-operations. Furtherthat the pin men i berg" arestrongly and. firmly'connected to therefiimi when once inserted; also? that after thetoothis applied to the plate it'is is provided with an adequate cushion or packi ng so that liability "of breakage is It will be trative and that I dofnotwish to be "limited therein within the scope of'the claims withtion: 7 Y

What-Iidaim'isra I -l. An artificial tooth ha ving an elongated 8 seat formed with eXtensionsF F, an;

.out departing from the spi'rit of the inven-.. l"

" opening Cd'eziding to I said seat ==jand "said tooth having over-hanging portionsand G--G,Tif1 combination with apin'memberfI h ving abody portion-Handextensiensl I;- 7 said body portion and, extensionsflbeing'1:

adapted-when the pin'memb'er is temporarily distorted to pass through said open 'ing C- and whe -restored; to iitir'ttnz'tl' condi- 1 f5 tions to lie withinsaidseat, body of said pinfniember lyingbeneath' said overhanging portion andsaid extensions I I ing bene Sa d er-bai Portions provided: with a slot having a portion dis posed the plane of theseatfand opening into the same atone sidej'and .at the otheror side beingeurved OIltWZLIdlY ELIldJ another 5 v portion disposed transversely of -the 3 seat and curved to register withthe curved side i of the first-mentionedportion, 1 V I 3. Thecoi'nbination with 'a tooth-:having a chamber anda curvedslo't leading thereto equal in length tothei -length of thechambe'r and having its endsplocate'd in. frontof the chamber, of ayieldablebar capableof trav 'ersing" the slot when flexed and of occupy ing' thesea't when i'n normal position;and

- prising a'flexiblebar. and a pair of pins carried by the bar inwardly of its-ends, and a toothhavingan undercut seat for such bar, theibar being located in the seat and 'unplane of the seat andfopening into the same flat. one side, and 'another portion-i being Q .7 curvedand disposed transversely oftheseat 1 9 r u'ridertb d that the of. the invention shown and described'is illusof the first-mentioned portion, of a yieldable bar capable of traversing the slot when flexed and of occupying the seat When in normal position, and pins carried by such bar and located in the slot When the bar is seated.

6. The combination With a tooth having Within it a fastener seat, of a fastener in the form of a pair of pins connected by a loop, said loop being disposed in the seat, the tooth being provided with an integral shelf free its ends and one side, and having a face engaging the loop and disposed transversely of the Working strain upon the plus.

In Witness whereof, I have hereunto signed my name in the presence of twosubscribing Witnesses.

FRANK T. VAN WOERT.

Witnesses:

EUGENE V. MYERS, FRED WHITE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Patents. Washington, D. G." 

